Add a system test to modify and import an exported container.

This test has completed one of TODO items in test/system/TODO.md.
The item is "Implied pull, build, export, modify, import, tag, run, kill"

Signed-off-by: Tsubasa Watanabe <w.tsubasa@fujitsu.com>

test/system/125-import.bats

@@ -43,3 +43,66 @@ load helpers
     is "$output" "$random_content" "tagged import via stdin"
     run_podman rmi -f $fqin
 }
+
+@test "podman export, alter tarball, re-import" {
+
+    # Create a test file following test
+    mkdir $PODMAN_TMPDIR/tmp
+    touch $PODMAN_TMPDIR/testfile1
+    echo "modified tar file" >> $PODMAN_TMPDIR/tmp/testfile2
+
+    # Create Dockerfile for test
+    dockerfile=$PODMAN_TMPDIR/Dockerfile
+
+    cat >$dockerfile <<EOF
+FROM $IMAGE
+ADD testfile1 /tmp
+WORKDIR /tmp
+EOF
+
+    b_img=before_change_img
+    b_cnt=before_change_cnt
+    a_img=after_change_img
+    a_cnt=after_change_cnt
+
+    # Build from Dockerfile FROM non-existing local image
+    run_podman build -t $b_img $PODMAN_TMPDIR
+    run_podman create --name $b_cnt $b_img
+
+    # Export built container as tarball
+    run_podman export -o $PODMAN_TMPDIR/$b_cnt.tar $b_cnt
+    run_podman rm -f $b_cnt
+
+    # Modify tarball contents
+    tar --delete -f $PODMAN_TMPDIR/$b_cnt.tar tmp/testfile1
+    tar -C $PODMAN_TMPDIR -rf $PODMAN_TMPDIR/$b_cnt.tar tmp/testfile2
+
+    # Import tarball and Tag imported image
+    run_podman import -q $PODMAN_TMPDIR/$b_cnt.tar \
+        --change "CMD sh -c \
+        \"trap 'exit 33' 2;
+        while true; do sleep 0.05;done\"" $a_img
+
+    # Run imported image to confirm tarball modification, block on non-special signal
+    run_podman run --name $a_cnt -d $a_img
+
+    # Confirm testfile1 is deleted from tarball
+    run_podman 1 exec $a_cnt cat /tmp/testfile1
+    is "$output" ".*can't open '/tmp/testfile1': No such file or directory"
+
+    # Confirm testfile2 is added to tarball
+    run_podman exec $a_cnt cat /tmp/testfile2
+    is "$output" "modified tar file" "modify tarball content"
+
+    # Kill can send non-TERM/KILL signal to container to exit
+    run_podman kill --signal 2 $a_cnt
+    run_podman wait $a_cnt
+
+    # Confirm exit within timeout
+    run_podman ps -a --filter name=$a_cnt --format '{{.Status}}'
+    is "$output" "Exited (33)" "Exit by non-TERM/KILL"
+
+    run_podman rm -f $a_cnt
+    run_podman rmi $b_img $a_img
+
+}